Pizza. Just kidding that's the most overrated one.
Pasta in general is underrated. Not counting spaghetti because of Undertale. Stuff like Gnocchi and fettucine aren't talked about enough. Even if they are they aren't rated high enough.

Don't you dare say Meecrob. I will sick my cats on you if you do that. Cartman is right, that crap is NASTY. To me, the most underrated foods are: "Hot Pockets." lol

I know they're nasty but they kept me alive when I couldn't eat anything else due to being allergic to EVERYTHING. Bread and cheese are two things I'm not allergic to. I just had to be careful and not get any of the pretzel or flavored crusts, Original 4 or 5 cheese was about all I could eat. Ham too but those were too nasty even fore me.